Boot attachment for skis



April 21, 1970 e. P. J. SALOMON BOOT ATTACHMENT FOR SKIS Filed Dec. 11. 1967 Fig.1

INVENTOR United States Patent 3,507,510 BOOT ATTACHMENT FOR SKIS Georges P. J. Salomon, 34 Avenue de Loverchy, Annecy, Haute-Savoie, France Filed Dec. 11, 1967, Ser. No. 689,605 Int. Cl. A63c 9/85 US. Cl. 28011.35 1 Claim ABSTRACT OF THE DISCLOSURE An attachment for holding a boot against a ski in which a support is pivoted to the ski for supporting a boot holding jaw pivoted at the center to the support. Lugs are provided at the ends of the jaw to slide on two ramps fixed to the ski. The slope of the ramps is at least equal to the angle of friction between the lugs and guide ramps.

The present invention relates to an improved attachment for retaining a boot against a ski.

Attachments for skis are known which comprise movable retaining members which, during the safety opening release of the attachments, are guided or restricted in the movements by ramps provided on cams on the base plate of the device, on other stationary or movable elements, etc.

These guiding ramps are generally unsatisfactory because they are not reversible, that is, if the members that they guide or restrict are forced to describe an identical movement but in reversed direction to that carried out during release, they cannot come back to the original position.

The present invention proposes to overcome these inconveniences in a simple and efficient manner.

According to the invention, the ramp or ramps of the various attachment members ensure the guiding and/or amplitude restriction of the movements of the movable members, such as the restraining members, are so provided that the angle of the slope thereof be either greater or equal to the friction angle of the movable members and, consequently, allow an easy sliding of the latter even under the action of a small force thus making their automatic return possible.

The invention will be better understood by reference to the following description and the appended drawing giving, by way of non-limitative example, a preferred embodiment of the invention.

FIGURE 1 is a plan view of the ramps of attachment members for skis, ramps obtained according to a known form, on the one hand, and according to the invention, on the other hand.

FIGURE 2 is a diagram explaining the device of FIG- URE 1.

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In FIGURE 1, the attachment comprises a support 1 rotatable about a stationary axle 2 and a jaw 4 for holding the boot of a used and also articulated on another axle 3. This jaw comprises two lugs 6 and 7 for guiding its movements which are adapted to slide on ramps 8, such as those existing in known attachments, or 9 as proposed in the instant invention. Indeed, as is particularly apparent in FIGURE 2 wherein the movements are diagrammatically brought to rectilinear movements, the portion 10 of the sliding guide ramp 8 may be considered as non reversible since it tends to stop lug 6 when the latter, guided by ramp 8 upon opening of the jaw, is forced to return according to arrow 12 (FIGURE 1) or 13 (FIGURE 2) during closure of the said jaw.

On the other hand, the sliding guide ramp 9 made according to the invention does not hold lug 7 when the latter is forced into a return movement of the jaw according to a direction reverse that shown by arrows 12 or 13.

Advantageously, this sliding guide ramp 9 is slightly inclined, in relation to -a line 16 representing its theoretical limit shape, an angle a greater or equal to the angle 7 of friction between the sliding guide ramp and the lug, thus ensuring strict reversibility of the member 8, even for a very weak return force, into initial position.

I claim:

1. In an attachment for holding a boot against a ski and including a support mounted on said ski to pivot about a first vertical axis and having an arcuate boot holding jaw centrally mounted on said support to pivot relative to said support about a second vertical axis, said jaw provided with upstanding lugs at the outer ends thereof away from said central pivot, the improvement in the combination of sliding guide ramps for said lugs fixed to said ski and each formed with a guiding surface defining with the theoretical limit circular path of said lugs about said first vertical axis, an angle a which is at least equal to the angle of friction between said lugs and said guiding surfaces whereby to ease sliding movement of said lugs on said guide ramps during return movement of said aw. 1 References Cited UNITED STATES PATENTS 3,079,164 2/1963 De Place 2801I.35

FOREIGN PATENTS 1,336,704 7/1963 France.

1,438,299 4/ 1966 France.

LEO FRIAGLIA, Primary Examiner J. A. PEKAR, Assistant Examiner 

